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AS4C16M16SA-6BIN Datasheet(PDF) 10 Page - Alliance Semiconductor Corporation |
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AS4C16M16SA-6BIN Datasheet(HTML) 10 Page - Alliance Semiconductor Corporation |
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10 / 55 page  AS4C16M16SA-C&I Confidential 9 Rev. 3.0 Mar. /2015 CLK COMMAND T0 T1 T2 T3 T4 T5 T6 NOP NOP READ A NOP NOP WRITE B NOP NOP T7 T8 NOP DQM DIN B0 DIN B1 DIN B2 DIN B3 CAS# Latency=2 tCK2, DQ Must be Hi-Z before the Write Command Don’t Care Figure 7. Read to Write Interval (Burst Length 4, CAS# Latency = 2) CLK COMMAND T0 T1 T2 T3 T4 T5 T6 NOP READ A NOP NOP NOP NOP WRITE B NOP T7 T8 NOP DQM DOUT A0 DIN B0 DIN B1 DIN B2 CAS# Latency=3 tCK3, DQ Must be Hi-Z before the Write Command Don’t Care Figure 8. Read to Write Interval (Burst Length ≧ 4, CAS# Latency = 3) A read burst without the auto precharge function may be interrupted by a BankPrecharge/ PrechargeAll command to the same bank. The following figure shows the optimum time that BankPrecharge/ PrechargeAll command is issued in different CAS latency. CLK COMMAND T0 T1 T2 T3 T4 T5 T6 READ A NOP NOP NOP Precharge NOP NOP Activate T7 T8 NOP CAS# Latency=2 tCK2, DQ CAS# Latency=3 tCK3, DQ DOUT A0 DOUT A1 DOUT A2 DOUT A3 DOUT A0 DOUT A1 DOUT A2 DOUT A3 ADDRESS Bank, Col A Bank (s) Bank Row tRP Figure 9. Read to Precharge (CAS# Latency = 2, 3) |
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